摘要:
Molding compounds that contain polyphenylene ethers which have been prepared from comonomers consisting of phenols substituted with benzyl groups exhibit improved mechanical properties, for example impact strength. Such molding compounds are useful for the production of industrial items such as pipes, panels or cases.
摘要:
Thermoplastic molding compounds are prepared from a functionalized polyphenylene ether and a polyamide. The polyphenylene ether is functionalized by the incorporation of a small quantity of a functionalized phenol monomer.
摘要:
A polyphenylene ether having at least one functional end group of the formula: ##STR1## in which R is a divalent C.sub.1-12 aliphatic group, n is 0 or 1, and R.sub.5 is hydrogen, a C.sub.1-8 alkyl group or a hydroxy-C.sub.2-8 -alkyl.
摘要:
Block copolymers based on polyphenylene ethers and polycondensates obtained by a process that comprises of the following steps:a polyphenylene ether with a functional end group is prepared by oxidative coupling of a mixture of 90.0 to 99.8 mole % of a substituted phenol and 10.0 to 0.2 mole % of a functionalized phenol;a polycondensation of suitable monomers is then carried out in the presence of this functionalized polyphenylene ether,are disclosed.
摘要:
Reducing 3,3', 5,5'-tetra-t-butyldiphenoquinone with 2,6-di-t-butylphenol, in the melt, in the presence of a 4-dialkylaminopyridine, and then dealkylating the intermediate formed, in the melt, by adding a phosphorus-containing acid or its derivative provides 4,4'-dihydroxybiphenyl of high purity in high yield.
摘要:
A thermoplastic moulding material is prepared by the admixture ofa) 3 to 80 parts by weight of polyphenylene ethers,b) 20 to 97 parts by weight of polyamides,c) 0.1 to 10 parts by weight of carbonates of the general formula ##STR1## in which X and Y independently of one another denote an alkyl, cycloalkyl, aryl or substituted aryl radical, each having up to 12 C atoms,d) 0 to 30 parts by weight of impact modifiers ande) 0 to 75 parts by weight of further polymers, if necessary.